:root{
  --bg:#04070c;

  --glass: rgba(255,255,255,.08);
  --border: rgba(255,255,255,.14);

  --accent: rgba(120,255,255,.65);
  --glow: rgba(120,255,255,.25);

  --ease: cubic-bezier(.2,.8,.2,1);
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;

  background:
    radial-gradient(circle at top, #0c1a30, #04070c 65%);

  color:#fff;
  overflow-x:hidden;
}


/* TOP */

.topbar{
  position:sticky;
  top:0;
  z-index:20;

  display:flex;
  align-items:center;
  gap:20px;

  padding:18px 26px;

  background: rgba(0,0,0,.6);
  backdrop-filter: blur(18px);

  border-bottom:1px solid var(--border);
}

.back{
  margin-right:auto;

  text-decoration:none;
  color:#fff;

  padding:8px 12px;
  border-radius:10px;

  border:1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.25);

  opacity:.85;
  transition:.25s;
}

.back:hover{
  opacity:1;
  border-color: var(--accent);
  box-shadow:0 0 20px var(--glow);
}

.title{
  font-size:13px;
  letter-spacing:.22em;
  opacity:.8;
}


/* HERO */

.hero{
  position:relative;

  min-height:100vh;

  display:flex;
  align-items:center;
  justify-content:center;

  text-align:center;
  overflow:hidden;
}

/* Orbs */

.hero::before,
.hero::after{
  content:"";
  position:absolute;
  border-radius:50%;
  filter: blur(140px);
  opacity:.5;
  pointer-events:none;
}

.hero::before{
  width:420px;
  height:420px;
  background:var(--accent);
  top:15%;
  left:-120px;
  animation: float1 18s infinite alternate;
}

.hero::after{
  width:380px;
  height:380px;
  background:rgba(180,120,255,.4);
  bottom:-100px;
  right:-120px;
  animation: float2 22s infinite alternate;
}

@keyframes float1{
  to{ transform:translate(80px,50px); }
}
@keyframes float2{
  to{ transform:translate(-70px,-40px); }
}


.hero-content{
  position:relative;
  z-index:5;

  max-width:760px;
  padding:0 26px;
}

.hero h1{
  font-size:56px;
  margin-bottom:16px;

  background: linear-gradient(
    120deg,
    #fff,
    #b9ffff,
    #fff
  );
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}

.hero p{
  font-size:16px;
  opacity:.8;
  line-height:1.6;
}


/* STORY LINE */

.story{
  position:relative;
  max-width:1000px;
  margin:0 auto;
  padding:100px 26px;
}

.story::before{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:50%;
  width:2px;

  background:
    linear-gradient(
      transparent,
      var(--accent),
      transparent
    );
  opacity:.4;
}


/* NODE */

.node{
  position:relative;
  display:flex;
  gap:40px;

  margin:100px 0;

  opacity:0;
  transform: translateY(50px);

  transition:1s var(--ease);
}

.node.show{
  opacity:1;
  transform:none;
}

.node:nth-child(even){
  flex-direction:row-reverse;
}

.node::before{
  content:"";
  position:absolute;
  top:20px;
  left:50%;

  width:18px;
  height:18px;

  background:var(--accent);
  border-radius:50%;

  transform:translateX(-50%);

  box-shadow:0 0 25px var(--glow);
}


/* CARD */

.node-card{
  width:50%;

  background:var(--glass);
  border:1px solid var(--border);
  border-radius:24px;

  padding:36px;

  backdrop-filter: blur(14px);

  box-shadow:0 30px 60px rgba(0,0,0,.6);
}

.node-card h2{
  margin-top:0;
  font-size:28px;
}

.node-card p{
  opacity:.78;
  line-height:1.7;
}


/* IMAGE */

.node-img{
  width:50%;
}

.node-img img{
  width:100%;
  border-radius:22px;
  border:1px solid var(--border);
}


/* CTA */

.cta{
  text-align:center;
  padding:120px 26px;
}

.cta a{
  padding:14px 28px;
  border-radius:999px;

  border:1px solid var(--accent);
  color:#fff;
  text-decoration:none;
}

.cta a:hover{
  box-shadow:0 0 35px var(--glow);
}


/* MOBILE */

@media(max-width:900px){

  .story::before{ left:16px; }

  .node,
  .node:nth-child(even){
    flex-direction:column;
    gap:26px;
  }

  .node::before{
    left:16px;
    transform:none;
  }

  .node-card,
  .node-img{
    width:100%;
  }

  .hero h1{ font-size:42px; }
}

/* Scroll Down Indicator */

/* Scroll Down Indicator */

.scroll-indicator{
  position:absolute;
  left:50%;
  bottom:100px; /* moved UP */
  transform:translateX(-50%);
  text-align:center;
  cursor:pointer;
  z-index:10;

  color:rgba(255,255,255,0.8);
  font-size:11px;
  letter-spacing:0.2em;
  text-transform:uppercase;
}

/* Arrow */


.scroll-indicator span{
  display:block;
  width:18px;
  height:18px;

  border-right:2px solid rgba(120,255,255,0.8);
  border-bottom:2px solid rgba(120,255,255,0.8);

  transform:rotate(45deg);

  margin:0 auto 12px; /* SPACE BELOW ARROW */

  animation:arrowFloat 1.6s infinite ease-in-out;
}


/* Text */

.scroll-indicator p{
  margin:0;
  margin-top:2px;
  opacity:0.7;
  font-size:10px;
}



/* Animation */

@keyframes arrowFloat{

  0%{
    transform:rotate(45deg) translate(0,0);
    opacity:0.4;
  }

  50%{
    transform:rotate(45deg) translate(0,8px);
    opacity:1;
  }

  100%{
    transform:rotate(45deg) translate(0,0);
    opacity:0.4;
  }

}